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CamelMhSummary * camel_mh_summary_new (CamelFolder *folder,const gchar *mhdir,CamelIndex *index);
Create a new CamelMhSummary object.
| folder | a parent CamelFolder | |
| mhdir | an MH directory for the new summary | |
| index | an optional CamelIndex to use, or  | [nullable] |